GABA_B receptors increased currents evoked by the GABA_A receptor δ subunit-selective agonist THIP. A, Currents evoked by THIP (10 μm) (left), the time course of current change for this cell (middle), and the mean THIP-induced currents under control conditions (con) and during baclofen application (right). B, THIP currents during application of baclofen (with CGP) or CGP alone normalized to control; **p < 0.01, n.s., nonsignificant.